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김두환,이재필,김종빈 建國大學校 附設 農業資源開發硏究所 1999 農資源開發論集 Vol.21 No.-
ABSTRACTThe following five mixtures of cool-season grasses(TF: Tall Fescue, KB: Kentucky Bluegrass, PR: Perennial ryegrass, CF: Chewing Fescue) were compared for the turfgrass performance on sand-based rootzone during summer in Korea: Mixture I (70% TF + 20% PR + 10% KB), Mixture II (50% TF + 20% PR + 10% KB + 20% CF), Mixture III (30% TF +20% PR + 50% KB), Mixture IV (40% PR + 60% KB), and Mixture V (30% PR + 40% KB + 30% CF).Mixture I and III resulted in even growing and rapid establishment. The establishment rate of Mixture IV and V was slow because of poor establishment. of PR. Uniformity was the highest in Mixture I and III low in Mixture II and V because CF was heavily damaged by hot and humid condition. Since ball bound depends on shoot density, Mixture V with low shoot density bounds the ball highest.Mixture I, III and V had high shoot density on June 16 and shoot density of all the mixtures decreased during summer because PR and CF were more damaged than the other species by hot and humid condition. Color harmony of Mixture I and III showed good and these may be a reflection of 70% TF and 50% KB , respectively. Color harmony of Mixture II and V showed not so good and this may be due to the damage of CF and PR by hot and humid condition.In conclusion, Mixture I and III would be recommended high quality of soccer fields in Korea.
溫斗炫,金鍾冕,任齊彬 全北大學校 1979 論文集 Vol.21 No.-
The viscosity of mucilage of Abelmoschus Manihot, MEDIC. root decrease by the influence of various mechanical, physical and chemical conditions. It was experimented by viscosity decrease of mucilage connected with hydrogen ion concentration, bacterial multiplication, disinfection with 70% ethanol, some antibiotics, such as streptomycin, penicillin, kanamycin and chloramphenicol and mucilage derived from autoclaved Abelmoschus Manihot MEDIC root. The resulfs obtained were as follows : 1. It was clear that the viscosity of mucilage decreased notably under the influence of infected bacteria and bacterial multiplication. 2. By the inoculation of Bacillus subtilis ATCC 6633 and Escherichia coli ML 1410 to the mucilage the viscosity decrease fast but the viscosity of mucilage derived from autoclaved Abelmoschus Manihot, MEDIC root decreased very slowly. 3. The small quantity of reducing sugar in the mucilage was detected. 4. Hydrogen ion concentration in the mucilage remained 6.5~8.0 in spite of the viscosity decrease.
Feasibility Study of CNN-based Super-Resolution Algorithm Applied to Low-Resolution CT Images
Doo Bin KIM(Doo Bin KIM),Mi Jo LEE(Mi Jo LEE),Joo Wan HONG(Joo Wan HONG) 한국인공지능학회 2024 인공지능연구 (KJAI) Vol.12 No.1
Recently, various techniques are being applied through the development of medical AI, and research has been conducted on the application of super-resolution AI models. In this study, evaluate the results of the application of the super-resolution AI model to brain CT as the basic data for future research. Acquiring CT images of the brain, algorithm for brain and bone windowing setting, and the resolution was downscaled to 5 types resolution image based on the original resolution image, and then upscaled to resolution to create an LR image and used for network input with the original imaging. The SRCNN model was applied to each of these images and analyzed using PSNR, SSIM, Loss. As a result of quantitative index analysis, the results were the best at 256×256, the brain and bone window setting PSNR were the same at 33.72, 35.2, and SSIM at 0.98 respectively, and the loss was 0.0004 and 0.0003, respectively, showing relatively excellent performance in the bone window setting CT image. The possibility of future studies aimed image quality and exposure dose is confirmed, and additional studies that need to be verified are also presented, which can be used as basic data for the above studies.
Kim, Bong Jik,Cho, Sung Woo,Jeon, Yung Jin,An, Sujin,Jo, Ara,Lim, Jae Hyun,Kim, Dong-Young,Won, Tae-Bin,Han, Doo Hee,Rhee, Chae-Seo,Kim, Hyun Jik Springer-Verlag 2018 Applied Microbiology and Biotechnology Vol.102 No.1
<P>We studied the contribution of Duox2 in mucosal host defense against influenza A virus (IAV) infection in in vivo lung. We found that Duox2 was required for the induction of type I and III interferon (IFN)s and transient Duox2 overexpression using cationic polymer polyethyleneimine (PEI) leads to suppression of IAV infection in in vivo lung. Twenty mice (C57BL/6J) were anesthetized and challenged by intranasal administration of 213 pfu/30 mu l of IAV (WS/33/H1N1), and IAV-infected mice were euthanized at 1, 3, 5, 7, 10, 14 days post infection (dpi). Duox2 small hairpin RNA (shRNA) and pCMV-Duox2 formulated with PEI were inoculated to mice to assess the regulatory mechanism between Duox2 and IFN secretion. Following intranasal IAV inoculation, viral infection was significantly aggravated from 3 dpi in in vivo lung and viral titer was highest at 7 dpi. Consistent with this, Duox2 messenger RNA (mRNA) and protein expressions were significantly induced from 3 dpi in the lung tissue of IAV-infected mice. Viral titer was much higher in IAV-infected mice that were inoculated with Duox2 shRNA accompanied with lower survival rate and extensive lung pathologies. Interestingly, severe lung pathologies in IAV-infected mice were not observed and viral titer was significantly reduced in mice with pulmonary administration of pCMV-Duox2 formulated with PEI before IAV inoculation. Both mRNA and secreted protein levels of IFN-beta and IFN-lambda(2/3) were highly elevated in IAV-infected mice with pCMV-Duox2 formulated with PEI. Duox2 is necessary for the regulation of IFN secretion in in vivo lung, and pulmonary administration of Duox2 DNA using cationic polymer triggers the induction of type I and III IFNs resulting in more complete suppression of IAV infection.</P>
Flora of a Cool Temperate Forest Around Restoration Center for Endangered Species, Yeongyang
Kim, Seongjun,Lee, Chang-Woo,Park, Hwan-Joon,Lee, Byoung-Doo,Hwang, Jung Eun,An, Jiae,Park, Hyung Bin,Baek, Ju Hyeong,Kim, Pyoung Beom,Kim, Nam Young National Institute of Ecology 2021 국립생태원회보(PNIE) Vol.2 No.1
The present study aimed to clarify flora living at the area of Restoration Center for Endangered Species in Yeongyang, Gyeongbuk Province. In May, August, and September 2019 and in May and July 2020, all of vascular plants were recorded, and endangered, Korea endemic, and exotic plant species were further identified. The study site contained a total of 418 floral taxa (98 families, 261 genera, 384 species, 4 subspecies, 27 variations, and 3 formations), in which Magnoliophyta accounted for larger proportion (95.2%) than Pteridophyta (3.6%) and Pinophyta (1.2%). In addition, 1 endangered (Cypripedium macranthos Sw.) and 5 Korea endemic species (Aconitum pseudolaeve Nakai, Eleutherococcus divaricatus var. chiisanensis [Nakai] C.H. Kim & B.-Y. Sun, Lonicera subsessilis Rehder, Paulownia coreana Uyeki, and Weigela subsessilis [Nakai] L.H. Bailey) were detected. The number of exotic species was 33, consisting of 4 invasive-exotic, 4 potentially invasive-exotic, and 25 non-invasive species. Compared to a previous assessment before the establishment of the center (in 2014), there were increases in total floral taxa (from 361 to 418), endangered species (from 0 to 1), and exotic species (from 26 to 33). These results possibly reflect temporal changes in floral community, which should be confirmed through subsequent long term monitoring.
Park, Hyeong Bin,Lee, Byoung-Doo,Lee, Chang Woo,Hwang, Jung Eun,Park, Hwan Joon,Kim, Seongjun,An, Jiae,Kim, Pyoung Beom,Kim, Nam Young National Institute of Ecology 2021 국립생태원회보(PNIE) Vol.2 No.4
Iris dichotoma Pall. found on Daechung Island in Korea has been designated as an endangered species. To aid in conservation efforts of this species, this study investigated its germination characteristics and seed dormancy type. Four sets of seeds were incubated at different temperatures (4/1℃, 15/6℃, 20/10℃, and 25/15℃). One set of seeds was cold stratified (4 weeks at 4/1℃). The final germination rate and mean germination time showed that the optimal germination temperature was 25/15℃. Final germination rates were ~70%, showing no significant difference among temperature treatments. However, mean germination time were significantly different among all temperature treatments except for 4/1℃. Mean germination time for seeds with temperature treatments of 15/6℃, 20/10℃, and 25/15℃ were 3.2, 2.1, and 1.5 weeks, respectively. At 25/15℃, the mean germination time was half of that at 15/6℃. Seeds of I. dichotoma had fully developed embryos at the time of dispersal. No additional growth of the embryo was observed. Cold stratification did not affect the final germination rate or the mean germination time. This study shows that seeds of I. dichotoma have no physiological or morphological dormancy, unlike other members of the Iris genus known to have seed dormancy that needs a relatively high incubation temperature (≥25/15℃) for mass propagation to occur. These results will be useful for understanding ecophysiological mechanisms related to the species' habitat. They are also useful for mass propagation of I. dichotoma for the purpose of conserving this endangered species.
Chun Hwan Kim,Seung Ho Jeon,Ki Cheol Seong,Doo Kyong Moon,Young Bin Jung,Chan Kyu Lim,Seong Cheol Kim,Daniel Son 한국국제농업개발학회 2016 韓國國際農業開發學會誌 Vol.28 No.1
This study was conducted to investigate the effects of various mulching materials on growth and yield of okra (Abelmoschus esculentus L. Moench). Three kinds of polyethylene (PE) mulching materials were used which are: black (Black), green (Green), and white and black on both sides (White), black non-woven fabric (Fabric), and barley straw (Straw) and the control plot (Control) were also used in this study. The change of soil temperature was observed in various mulching materials with Green showing the highest average temperature of 24.4o, followed by Black > Fabric > Control > White > Straw. The variation of plant length,, aboveground weight, and root weight were constant in the order of Green > Black > White > Fabric > Control > Straw. Total yield (number of fruits) were 281,000 in Green which was the highest yield, and the least was from Straw which was 62.3% of Green. Total weight of fruits in Green was 395 kg which was the heaviest, and in Straw was least with 226 kg Hence, the weight of fruits